For Private Equity firms.
The European technology operating partner for US PE firms, from acquisition due diligence through to exit.
Supporting US PE Firms Across the Full Cross-Border Lifecycle
Pre-Deal DD
Technology and IT due diligence on UK and European targets designed for US investment committees. Four to six weeks standard, 2-3 weeks for auction situations.
Hold-Period Support
Fractional CTO placement and periodic health checks in UK and European portfolio companies, giving US operating partners real technology visibility across the Atlantic.
Exit Preparation
Pre-sale technology audit that identifies what buyers will find and addresses it before the UK or European asset goes to market.
Buy-and-Build
Technology integration assessment across European acquisitions: platform consolidation, team restructuring, and architecture decisions across UK and continental targets.
Technology Advisory Across the Cross-Border Investment Lifecycle
Most US PE firms treat technology due diligence on European targets as a variation on their domestic process. It is not. The regulatory environment, the talent market, the contractor landscape, and the engineering culture in UK and European technology businesses are materially different from US norms. Issues that would surface immediately in a US context can be invisible to an advisor without direct operating experience in these markets.
Our advisory spans the full deal lifecycle, from pre-acquisition due diligence through exit, with practitioners who have operated in UK and European technology businesses and understand the risks that cross-border deals actually create. For a deeper look at how technology creates value in PE-backed businesses, see our article on unlocking technology value in private equity.
Pre-Deal: Due Diligence That Informs Term Sheets
Due diligence in a PE context should inform the investment decision, influence the price, and lay the groundwork for value creation. Our assessments are built for investment committees, not filing cabinets. We evaluate across the 5P Framework (People, Process, Product, Protection, and Platform) and translate every finding into what it costs to fix, how long it takes, and how it affects the business plan. For cross-border deals, we add explicit commentary on UK and European regulatory posture wherever it affects the deal thesis.
What We Look For
Can the technology support the growth thesis? If the business plan assumes doubling revenue in three years, can the platform handle it? In more than half our assessments, we find architecture decisions made at smaller scale that now constrain growth. Always fixable, but the remediation cost and timeline must be reflected in the deal model.
Is the team capable of executing the plan? A technology team that performed well at a certain revenue level may lack the skills, structure, or leadership to perform at the next level. We assess team composition, leadership quality, and key-person risk, frequently surfacing senior hires that should be factored into the value creation budget.
What has been hidden or misrepresented? CTOs, like all leaders, have incentives to present favorably. We have the operational experience to distinguish between a team that is genuinely performing and one that is "saying the right words and making big promises" while the reality tells a different story.
What are the UK and European regulatory risks? Portfolio companies operating in regulated UK and European industries face technology compliance requirements that US operating partners may not anticipate. FCA authorization, UK GDPR obligations, IR35 contractor classification, and sector-specific data requirements can all represent material liability. We assess whether the company is genuinely compliant or has accumulated risk that will surface at exit.
How We Deliver
Standard due diligence runs 4-6 weeks. For auction situations, we compress to 2-3 weeks and can deliver findings through structured verbal briefings when speed matters more than documentation. Every report includes an IC-ready executive summary, detailed assessment across all five pillars, a commercially quantified risk register, and a value creation roadmap with timeline and investment estimates.
"The platform everyone was calling 'cloud-native' was actually running on a single physical server in the CTO's garage. That finding changed the entire trajectory of the deal."
Hold-Period: Fractional CTO Placement and Technology Oversight
The period between acquisition and exit is where technology either creates value or quietly erodes it. For US PE firms operating UK and European portfolio companies from across the Atlantic, this is where the distance creates real risk.
Fractional CTO Placement
When a UK or European portfolio company needs technology leadership, whether the incumbent is underperforming, has left, or never existed at the required level, we place an experienced CTO from our partner bench. Our fractional CTO services page explains how this works in detail, including the dual reporting model that these engagements require. They embed 2-4 days per week and take operational ownership of the technology function, reporting to the CEO on operations and to the US operating partner on strategic progress.
The typical arc: month one, stabilize the team and assess the real state of things. Months two to three, execute the initial roadmap and address structural DD findings. Months four to six, embed sustainable processes and either transition to a permanent CTO or extend. We build capability and design ourselves out of the engagement.
Periodic Technology Health Checks
For UK and European portfolio companies that do not need ongoing CTO placement, we offer annual or semi-annual audits that track progress on DD recommendations, identify new risks, and benchmark technology maturity against the value creation plan. These give US operating partners a structured view of European assets without requiring travel for every review.
Portfolio-Level Reporting
For firms wanting a consistent technology perspective across their European portfolio, we provide regular reporting that aggregates technology risk and performance: identifying which companies are on track, which need intervention, and where risk is concentrated.
Exit Preparation: Technology That Withstands Buyer DD
We know exactly what buyers look for because we conduct buy-side DD ourselves. We assess your UK or European portfolio company the way a buyer's advisors would, identify the issues they will find, and build a remediation plan before the company goes to market. Our Rational Closedown methodology ensures a structured transition, documenting decisions, preparing handover materials, and leaving the technology organization ready for the next phase of ownership.
Technical debt. Every company has it. Buyers distinguish between deliberate, well-understood debt and accumulated, undocumented debt. We help portfolio companies document it, quantify it, and demonstrate a credible management plan.
Key-person dependencies. If critical knowledge lives in one person's head, buyers will price it. We build the documentation, cross-training, and team structure to mitigate this before a buyer's advisor raises the flag.
Security and compliance gaps. UK GDPR obligations, FCA requirements, and basic security hygiene are all common findings that give buyers leverage in European asset sales. These are among the most straightforward to fix given sufficient lead time.
Architecture limitations. Platforms built for current scale that will not support the buyer's growth assumptions. The most expensive issue to remediate and the one that requires the most lead time. Start this conversation 18 months before exit.
Buy-and-Build: Technology Integration Across European Acquisitions
US PE firms running buy-and-build strategies in Europe face a specific technology challenge: integrating multiple platforms, teams, and architectures that span UK and continental markets, often with different regulatory obligations and technology stacks. This is where EBITDA accretion from operational synergies either materializes or does not.
We support buy-and-build at two levels. Pre-acquisition, we assess target technology with a specific lens: platform compatibility, integration costs for the deal model, and whether the team is additive or redundant. Post-acquisition, we lead or advise on integration: platform consolidation, team restructuring, and the architectural decisions that determine whether the combined entity captures the synergies that justified the deal. H.I.G. Capital has engaged us to support exactly this kind of complex buy-and-build consolidation across their European portfolio.
How We Work with US PE Firms
The Dual Reporting Model
For hold-period engagements, we operate with operational accountability to the UK or European portfolio company CEO and strategic reporting to the US operating partner. This gives US investors visibility into assets they cannot easily monitor from across the Atlantic without undermining local company leadership. It works because we are genuinely independent: we do not take sides, and our only objective is improving the technology function in ways that create value for both parties.
The Relationship Model
Our most productive relationships are ongoing advisory arrangements. The US operating partner has a European technology advisor who understands the firm's portfolio, thesis, and standards. When a new European deal enters the pipeline, we move fast because we already understand the context. We provide similar portfolio-level support for venture capital firms, calibrated to earlier-stage economics and expectations. Our partners bring direct operating experience in the sectors they assess. In FinTech, for example, our team includes a former CTO who scaled a payments company from 40 to 300 engineers and led the technology evaluation for a significant strategic investment. With a bench of over 25 experienced CTOs and CPOs across the UK and Europe, we have the capacity to support multiple portfolio companies simultaneously and the sector breadth to match the right partner to each business.
Client Testimonials
"Rational Partners has established itself as a vital technical advisor to H.I.G. European Capital Partners. Their unique blend of agility and engineering heritage sets them apart. They move beyond standard 'red flag' reporting to deliver commercially focused, actionable strategies."
Frequently Asked Questions
Whether you need pre-deal technology DD on a UK acquisition target, a fractional CTO for a European portfolio company, or exit preparation that protects valuation, talk to a partner who understands the market.